Here You can avail the Download Game Killer Apk for Android. For Downloading and Installation Root is Required for This App.
Warning : Note That Rooting the app can brick your devices. You can read an article on How to Safely root your device with Kingroot from here.
Download Game Killer Apk | All Versions
If You Face Any Problem regarding installing Game killer Apk , You can Check out Game Killer Apk Installation process for android from this post.